Which is the equation in point-slope form of the line that passes through the point (1,-1) and has a slope of 4

y = 4x -5

Step-by-step explanation:

Gradient is also known as slope . The gradient of a line is represented by the equation

Slope (m)  = y - y1/ x - x1

Where m = 4 , x1= 1 and y1 = -1

Imputing the values into the equation

m = y - y1/ x - x1

4 = y -  -1/x - 1

Cross multiply, we have

y + 1= 4(x - 1)

Expand

y+1= 4x - 4

Subtract 1 from both sides

y+1-1= 4x -4-1

y = 4x -5

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